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Try either resetting the sensor, or the entire system. This can be accomplished by either disconnecting and reconnecting your O2 sensor from the main wiring harness (O2 sensor harness is located under the battery tray to left of the exhaust manifold and unscrews) or you can try changing the O2 sensor relay (the first orange relay you will encounter from the firewall on the driverside fenderwell). You could also try disconnecting and reconnecting the battery or using a reset tool. Just some ideas

Originally posted by chrome i've hit 210 km/h before and my engine light didn't turn, it was bouncing of the redline ... damn i really need a friggin 5th gear... but everything is cool for now i guess?

ive got the diagnostics machiene that can find out any problems on bmw, mercedez and v-dubs. its amazing it does everything, airbag, transmission, engine, service light, and u can check out stats on how the car is running pretty cool. let me know.

Originally posted by chrome Fcuk I pushed my car to 200km/h... (i'll post pics soon) and after hitting those high Rpm's my Check Engine Light turned on. How do I diagnose this problem. I doubt anything bad happened? No smoke, no weird smells or noises. HELP!